Abstract: A system and method for on-line training of a non-linear model for use in electronic commerce. The non-linear model is trained with training sets from a stream of process data. The system detects availability of new training data, and constructs a training set from the corresponding input data. Over time, many training sets are presented to the non-linear model. When multiple presentations are needed to effectively train the non-linear model, a buffer of training sets is filled and updated as new training data becomes available. Once the buffer is full, a new training set bumps the oldest training set from the buffer. The training sets are presented one or more times each time a new training set is constructed. An historical database may be used to construct training sets for the non-linear model. The non-linear model may be trained retrospectively by searching the historical database and constructing training sets.

Abstract: A Wheeled vegetation trimmer with an adjustable height cutting element includes an adjuster member having a locking plate for positioning the adjuster assembly along a length of the shaft by selectively engaging the locking plate with a desired slot on a spindle and a partial ball-shaped and freely spinning ground contacting member.